start.js

#!/usr/bin/env node

/* eslint-disable no-console,@typescript-eslint/no-var-requires */
const http = require('http');

// 直接在当前进程中启动 standalone Server（`server.js`）
require('./server.js');

// 每 1 秒轮询一次，直到请求成功
const TARGET_URL = `http://${process.env.HOSTNAME || 'localhost'}:${
  process.env.PORT || 3000
}/login`;

const intervalId = setInterval(() => {
  console.log(`Fetching ${TARGET_URL} ...`);

  const req = http.get(TARGET_URL, (res) => {
    // 当返回 2xx 状态码时认为成功，然后停止轮询
    if (res.statusCode && res.statusCode >= 200 && res.statusCode < 300) {
      console.log('Server is up, stop polling.');
      clearInterval(intervalId);
    }
  });

  req.setTimeout(2000, () => {
    req.destroy();
  });
}, 1000);